MINOR: Update sphinx.md to add basic windows service documentation, a…

…nd to note the existance of the fulltext search module

docs/sphinx.md

@@ -7,11 +7,23 @@
 * Mark Stephens
   <mark (at) silverstripe (dot) com>
 
-## Requirementsld
+## Requirements
 
 * SilverStripe 2.4 or newer
 * sphinx binary installation 0.9.9-rc2 or greater with 64-bit document id
 
+## Alternative fulltext search modules
+
+This module may in the future be replaced by the fulltext search module, currently in development at
+https://github.com/silverstripe-labs/silverstripe-fulltextsearch
+
+In particular, for projects with very large amounts of data to be stored in the index or projects that will
+be hosted in windows environments, the fulltext search module with it's Solr connector is likely to be a better
+solution.
+
+The sphinx connector for the fulltext search module is not yet developed as of this writing, but once that has happened
+this module is likely to be deprecated.
+
 ## Licensing
 
 The file sphinxapi.php is the official php client for Sphinx, and is distributed
@@ -70,6 +82,11 @@ If you are using MAMP:
 * Make sure your database string in _ss_environment has the port number included
   i.e. define('SS_DATABASE_SERVER', 'localhost:8889');
 
+If you are using Windows:
+Sphinx runs as a service on windows. This service needs to be controllable by the user the webserver acts as.
+This module provides a Sphinx/install task which will install & adjust the permissions of a sphinx service
+as required by the most common configuration under windows.
+
 ## Refresh Configuration and Reindex
 
 /dev/build the project. This will update the database structure, but also